Siemens SINAMICS V90 Operating Instructions Manual page 315

Fault
F7412: Commutation angle
incorrect (motor model)
Message class: Actual posi-
tion/speed value incorrect or not
available (11)
Reaction: ENCODER
Acknowledgement:
IMMEDIATELY
F7420: Drive: Current setpoint
filter natural frequency > Shan-
non frequency
Message class: Error in the
parameteriza-
tion/configuration/commissionin
g procedure (18)
F7442: LR: multi-turn does not
match the modulo range
Message class: Error in the
parameteriza-
tion/configuration/commissionin
g procedure (18)
Reaction: OFF1 (OFF2, OFF3)
Acknowledgement:
IMMEDIATELY
F7443: Reference point coordi-
nate not in the permissible
range
Message class: Error in the
parameteriza-
tion/configuration/commissionin
g procedure (18)
Reaction: OFF1 (OFF2, OFF3)
Acknowledgement:
IMMEDIATELY
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2020, A5E37208830-008
Cause
An incorrect commutation angle was
detected that can result in a positive
coupling in the speed controller.
Possible causes:
The motor encoder is incorrectly
•
adjusted with respect to the magnet
position.
The motor encoder is damaged.
•
Data to calculate the motor model
•
has been incorrectly set.
Pole position identification might
•
have calculated an incorrect value
when activated.
The motor encoder speed signal is
•
faulted.
The control loop is instable due to
•
incorrect parameterization.
One of the filter natural frequencies is
greater than the Shannon frequency.
The ratio between the multi-turn resolu-
tion and the modulo range (p29246) is
not an integer number. This results in
the adjustment being set back, as the
position actual value cannot be repro-
duced after power-off/power-on.
The reference point coordinate received
when adjusting the encoder via con-
nector input p2599 lies outside the half
of the encoder range and cannot be set
as actual axis position.
Fault value (r0949, interpret decimal):
Maximum permissible value for the ref-
erence point coordinate.
12.2 List of faults and alarms
Remedy
If the encoder mounting was changed, re-
•
adjust the encoder.
Replace the defective motor encoder.
•
Correctly set the motor stator resistance,
•
cable resistance and motor-stator leakage
inductance.
Calculate the cable resistance from the
cross-section and length, check the in-
ductance and stator resistance using the
motor data sheet, measure the stator re-
sistance, e.g. using a multimeter - and if
required, again identify the values using
the stationary motor data identification.
With pole position identification activated,
•
check the procedure for pole position
identification and force a new pole posi-
tion identification procedure by means of
de-selection followed by selection.
Reduce the numerator or denominator
•
natural frequency of the current setpoint
filter involved.
Switch out the filter involved (p1656).
•
Make the ratio between the multi-turn resolu-
tion and the modulo range an integer number.
The ratio v is calculated as follows:
Motor encoder without position tracking
•
(p29243 = 0):
– For multi-turn encoders:
v = (4096 * p29247 * p29248)/(p29249 *
p29246)
– For single-turn encoders:
v = (p29247 * p29248)/(p29249 * p29246)
Motor encoder with position tracking
•
(p29243 = 1):
v = (p29244 * 29247)/p29246
Set the reference point coordinate to a lower
value than specified in the fault value.
See also: p2599 (EPOS reference point coor-
dinate value)
For a motor with an absolute encoder, the
maximum permissible encoder range is calcu-
lated by the following formula:
For multi-turn encoders:
•
(4096 * p29247) / 2
For single-turn encoders:
•
p29247 / 2
Diagnostics
313